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. In this contribution, the first anuran fossils from classical Santacrucian localities of the Rio Santa Cruz are described. According to proportions and features recognized in the few skull elements recorded, the remains are assigned to the southern gondwanan Calyptocephalella cf. canqueli . This identification extends geographically the distribution of the fossil taxon, defining this species to be a conspicuous component of the aquatic environments of the warm temperate climatic biotas during the late Oligocene – early Miocene times of Patagonia. Key words. Calyptocephalellidae. Calyptocephalella canqueli . Neobatrachia. Neogene. Barrancas Blancas Locality. Resumen . En esta contribucion se describen los primeros fosiles de anuros de las localidades clasicas Santacrucenses del Rio Santa Cruz. De acuerdo con las proporciones y caracteristicas reconocidas en los elementos del craneo registrados, los restos se asignan a la Calyptocephalella cf. Canqueli . Esta identificacion extiende la distribucion geografica del taxon fosil y define a esta especie como un componente conspicuo de los ambientes acuaticos de las biotas templado calidas durante el Oligoceno Tardio - Mioceno Temprano de Patagonia. Palabras clave.  Calyptocephalellidae. Calyptocephalella canqueli. Neobatrachia. Neogeno. Localidad Barrancas Blancas.

publicación electrónica de la asociación paleontológica argentina

CALYPTOCEPHALELLA (ANURA, AUSTRALOBATRACHIA) REMAINS FROM THE RíO SANTA CRUZ (EARLY-MIDDLE MIOCENE, SANTA CRUZ FORMATION), SANTA CRUZ PROVINCE, ARGENTINA